The Claim
In young women, higher pre-immobilization leg fat-free mass and quadriceps cross-sectional area are associated with greater muscle loss following 14 days of lower limb immobilization, with a coefficient of determination ranging from r²=0.54 to r²=0.68 and statistical significance at P<0.05.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Young women with more muscle mass in their legs before immobilization lose more muscle during 14 days of leg immobilization compared to those with less muscle mass.
See the scientific wording
In a small subgroup of nine young women, higher pre-immobilization leg fat-free mass and quadriceps cross-sectional area were associated with greater muscle loss after 14 days of immobilization (r²=0.54–0.68, P<0.05), suggesting a potential sex-specific relationship not observed in men.
When a person has more muscle before being inactive, their muscles respond to inactivity by turning on more breakdown systems and turning off more growth signals, causing them to lose more muscle than someone with less muscle to begin with.
What the research says
1 studyIn a small group of young women, those who had more muscle before being bedridden ended up losing more muscle than those with less muscle — a pattern not seen in men. This matches what the claim says, but more research is needed to be sure.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.